Challenges in a Multidisciplinary Approach for Explosion Design for Floating Facilities
Floating-liquefied-natural-gas (FLNG) units have been under development for decades. They are now becoming a reality, combining the design and installation of liquefied-natural-gas (LNG) units with a traditional floating production, storage, and offloading facility. Because FLNG facilities handle large flammable-gas quantities in a relatively small and congested environment compared with onshore LNG plants, the explosion risk is expected to be higher than that for some other offshore floating facilities. As a consequence, the intensity of the resulting blast loads on the unit can be more severe, even if the likelihood of explosion in the de- sign is considered to be low through frequency analysis.
Even if prevention and mitigation measures are implemented to reduce risk to as low as reasonably practicable, safety-critical ele- ments (SCEs) such as main equipment and structures should be designed to withstand the blast event. Because the explosion events are very specific (high intensity and short duration), the common design rules and tools should be updated to take into account this accidental event. In addition, the associated performance criteria for SCEs should be modified. Finally, the entire design should comply with safety objectives (personnel protection, prevention of escalation).
This paper focuses on the philosophy of design against a blast event on floating facilities in general, but with a particular focus on FLNG units. It will review the critical functions of the unit that must be maintained during emergency evacuation to protect people and identify the key parameters governing the explosion strength on floating facilities. It will show that the derivation of ef- fective explosion loads on structures and equipment on the basis of computational-fluid-dynamics simulations is not straightforward and requires expertise in explosion modeling and explosion response. The paper will also show how all the engineering disciplines in Technip individually apply these blast loads in their designs through nonlinear-finite-element analysis. Finally, the paper will highlight the interface between the engineering disciplines and how a consistent demonstration through the design can be achieved to fulfill the safety goals, taking engineering further.
Nigeria LNG Nears FID on Train 7 Project
After failing to meet a previous 2018 deadline, the owners of the Bonny Island plant say they are close to sanctioning the expansion project following the signing of a letter of intent to a consortium of Saipem Chiyoda and Daewoo for EPC services. Train 7 is expected to add 8 mtpa to Bonny Island’s
Novatek Sanctions Arctic LNG 2 Project
With a production capacity of nearly 20 mtpa, Wood Mackenzie says the project would be the largest single project to reach FID. Novatek plans to spend more than $21 billion to launch the project at full capacity. Startup is scheduled for 2023.
Train 2 at Corpus Christi LNG Plant Complete
Operator Cheniere now has seven completed liquefaction trains under its control, with two trains done at Corpus Christi and five at Sabine Pass. First commercial delivery from Corpus Christi is still on track for May 2020.
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09 September 2019
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09 September 2019
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